Kim Cattrall has claimed that losing the extra weight she put on for the new film Meet Monica Velour proved to be a "difficult" challenge.

During an interview with CNN host Piers Morgan, the actress revealed that she was initially happy to be allowed to gain weight for the role of an aging porn star.

"It was fantastic," Cattrall said. "You eat whatever the hell you want and you can have as much of it [as you desire]."

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The Sex And The City star added: "I'm cursed with a huge appetiteâ€¦ for food! So for my whole life, I've been on a diet. Literally, as soon as I was signed by an agent, the first thing she said was, 'You're really talented, you're terrific, but you've got to lose ten pounds'. So someone finally gives me a part where I can eat what I want, drink what I want, do what I want."

After wrapping production on Meet Monica Velour, however, Cattrall realised that it wasn't going to be easy dropping the extra pounds she'd put on for the role.

"As I said to a friend of mine, it was heaven putting it on, but it was friggin' hell to get it off," she admitted. "It was so difficult."